Re: PHP + PDO + PGPOOL = Segmentation fault

I assume you get segfault of pgpool.
Can you take a coredump and backtrace? That will be very helpfull to
inspect your problem.
--
Tatsuo Ishii
SRA OSS, Inc. Japan

> Hello,
>
> I have a script which is written in PHP (5.2.8) + PDO (1.0.3). It's stable,
> but actual version of PGSQL driver for PDO don't allow persistent
> connections.
>
> So we decided to use PGPOOL-II-2.2.5. It's configured to work in connection
> pool mode with following settings:
>
> # number of pre-forked child process (I know it's many, but we test from 32
> till 256)
> num_init_children = 256
>
> # Number of connection pools allowed for a child process (tested from 2 till
> 10)
> max_pool = 2
>
> # If idle for this many seconds, child exits.  0 means no timeout.
> child_life_time = 300
>
> # If idle for this many seconds, connection to PostgreSQL closes.
> # 0 means no timeout.
> connection_life_time = 30
>
> # If child_max_connections connections were received, child exits.
> # 0 means no exit.
> child_max_connections = 0
>
> # If client_idle_limit is n (n > 0), the client is forced to be
> # disconnected whenever after n seconds idle (even inside an explicit
> # transactions!)
> # 0 means no disconnect.
> client_idle_limit = 10
>
> no replication or parallel query support enabled.
>
> When our script establish connection to PGPOOL, it can work well or can fail
> with "Segmentation fault". Measurement shows that 40% of script executions
> failed with "Segmentation fault" and always under heavy stress.
>
> Does anyone faced with such problem?
> --
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